Ray-Ban 2132 New Wayfarer - Chris Evans - What's Your Number?
In the romantic comedy movie What's Your Number?, actor Chris Evans wears a pair of Ray-Ban RB2132 New Wayfarer sunglasses with black frame and Crystal Green lenses (color code 901). It looks like Chris Evans' sunglasses have the Polarized lenses (the "p" behind the Ray-Ban logo can just be spotted). The New Wayfarer is a slightly updated version of the original Wayfarer, one of the most popular sunglasses frames ever made. The Wayfarer can be seen in many films (see sightings here).
Reference: Ray-Ban RB2132 New Wayfarer Black frame / Crystal Green polarized lenses (901/58)